class_docstr: Give a sentiment intensity score to sentences.
code: def _punctuation_emphasis(self, sum_s, text):
      # add emphasis from exclamation points and question marks
      ep_amplifier = self._amplify_ep(text)
      qm_amplifier = self._amplify_qm(text)
      punct_emph_amplifier = ep_amplifier + qm_amplifier
      return punct_emph_amplifier
  
imports: import math
  import re
  import string
  from itertools import product
  import nltk.data
  from nltk.util import pairwise
label_desc: Use image node_id 9 for calling the SentimentIntensityAnalyzer obj's underlying member method code with example usage: obj._punctuation_emphasis(sum_s, text) and returns: punct_emph_amplifier